A sound with a greater frequency has a ________ pitch. a)lower b)higher c)neither of these
What is b)higher
100
Sound waves travel most slowly through an area of _____ air. a)cold b)warm c)wet d)dry
What is d) dry
100
The greatest amount of potential energy would be at the _____ of the slide. a)bottom b)curve c)top d)middle
What is c) top
100
A ________ lens will bend light waves and focus to a point. a)contact b)convex c)concave d)conduct
What is b)convex
100
Ice melting in your hand is an example of _____________. a)conduction b)radiation c)convection d)none of these
What is a)conduction (direct contact)
200
T/F: Particles move slowest in hot substances.
What is False: Particles move FASTEST in hot substances.
200
T/F: Conduction currents transfer heat in the ocean.
What is False: CONVECTION currents transfer heat in the ocean.
200
T/F: A basketball would have greater kinetic energy than a marble.
What is True.
200
T/F: A radio transforms electrical energy to light energy.
What is False: A radio transforms electrical energy to SOUND energy.
200
T/F: The amount of energy a food item has decreases as the calories of that item decreases.
What is True.
300
Energy (can/cannot) be created (and/or) destroyed.
What is: Energy CANNOT be created OR destroyed.
300
A firecracker releases ________, _________, and ________ energy.
What is: in any particular order: sound, light, and thermal.
300
____________ energy is released when a proton is knocked out of an atom's nucleus.
What is Nuclear.
300
Light waves travel in __________ lines.
What is straight
300
When light enters a new material, it will _______.
What is bend.
400
List the 3 methods of heat transfer.
What is (in any particular order) conduction, convection, radiation.
400
Describe how conduction transfers heat.
What is conduction is the transfer of heat by touch (direct contact)
400
Describe how convection transfers heat.
What is: convection is the transfer of heat through a gas or liquid.
400
Describe how radiation transfers heat.
What is: radiation transfers heat through electromagnetic energy.
400
Give an example of each of the 3 methods of heat transfer.
What is 1) CONDUCTION: (anything with direct contact from a hot surface/medium) EX)metal spoon in hot cocoa/ pan on hot burner 2)CONVECTION: (anything that explains how a gas or liquid gets heated up) EX)microwave heating popcorn through convection currents 3)RADIATION EX)sun's rays heating Earth's surface
500
Describe what happens to the potential energy and the kinetic energy of a ball as it rolls down a hill from a position of rest at the top of the hill.
What is: At the top of the hill. the ball will have the greatest amount of potential energy and the least amount of kinetic energy. As the ball rolls down the hill, its potential energy will transform to kinetic energy.
500
Compare the frequency AND energy of infrared rays to the frequency and energy of visible light.
What is: Infrared waves have lower frequencies and energies than visible light waves BECAUSE of the length of the wavelength. The longer the wavelength, the lower the frequency and energy.
500
EXPLAIN the direction in which thermal energy naturally flows.
What is: Thermal energy naturally flows from a warmer object to a cooler object until both objects are the same temperature.
500
Name both lenses and describe the shape of these two lenses.
What is: Concave: curves inward (similar to a cave) & Convex: curves outward (like rounded edge of a moon)
500
Of the following heat transfer examples, label each as one kind of heat transfer method. 1)Baking cookies in an oven. 2)The sun warming me on a bike ride. 3)Scrambling eggs on a stovetop in a stainless steel pan.